Columbia keychain light

Is there anybody having experience with one of these?

I've seen them before, and I recall they run on 3 AG3 pill cells with a 5mm led.

you can buy a 2 pack unbranded on DX for a few bucks.

Personally if you like this form factor you might want to check out the other lights that run on AAA batts instead. It's not much larger in size but is more powerful.

Check out the Tank007 E08 .

And there's a less bright clone with a long run time, for less cost.

It can be kept with me anywhere, which shop will be better to buy the columbia keychain flashlight, how much it is?

Just google key chain lights ,,,,and click on images .. they are all over the net just don't have columbias name on them .. usually 4 for 10$ ??

http://www.google.com/search?q=Carabiner+key+chain+light&hl=en&safe=off&rls=com.microsoft:en-us:IE-ContextMenu&rlz=1I7RNWN_en&prmd=ivns&source=lnms&tbm=isch&ei=-eRZTrDQFYS2twfuvb2nDA&sa=X&oi=mode_link&ct=mode&cd=2&ved=0CF0Q_AUoAQ&biw=1184&bih=527